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Pride dx-300

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  #25  
Old 07-18-2011, 02:46 PM
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Nomad selling on eBay---> Pride DX300 Heavy-Duty High Voltage retrofit pc board | eBay
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  #26  
Old 07-18-2011, 05:03 PM
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It is very hard to find anyone that has more hands on with old tube amps as Chris at NOMAD Radio does.

73
Jeff
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Old 07-18-2011, 07:54 PM
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I have had a few of the Pride DX-300, great amps if not abused.

Have had several come across the bench over the years and most had HV boards damaged.

I remember back in the 80's I put Peter Dahl transformers into one of my Pride 300's.

I sold or traded it off but it found it's way back to my bench few months ago.

Burned up bias, burned up keying circuit the list goes on.

Back up and running again and the owner would not part with it as I tried my best to get that amp back with the Peter Dahl Iron in it.

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  #28  
Old 07-23-2011, 11:39 AM
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Quote:
Originally Posted by AudioShockwav View Post
Can you post some pictures of the boards in question?
What is it not doing?

73
Jeff



Trying to figure out what the pin numbers are, and their locations on the board so I can trace the wires. Any help here would be greatly appreciated. I can't find any schematics on this board.

Thanks, 73
Dave

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  #29  
Old 07-23-2011, 04:31 PM
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Quote:
Originally Posted by KC8PCL View Post


Trying to figure out what the pin numbers are, and their locations on the board so I can trace the wires. Any help here would be greatly appreciated. I can't find any schematics on this board.

Thanks, 73
Dave
try this site full manual with schematics and picture.

Pride DX300 Manual

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  #30  
Old 07-24-2011, 06:50 AM
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Default Pride dx 300

Thanks for the response, but I have searched everywhere on the web only to find the newer version of this board. I think that this board is an earlier version that no one can find any information on it, But thanks anyway.

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  #31  
Old 10-05-2011, 04:17 PM
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I don't know much about electronics....but isn't buying old linears like buying a pig in a poke? don't caps wear out after 20-30yrs?

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  #32  
Old 10-05-2011, 05:20 PM
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Nothing wrong with those amps in general. All amps have compromises in them some place to make it to a given price point! Why? Because a lot of people do not have a lot of excess money or they do not wish to spend a lot for their hobby. Not everyone has to die with the most toys or the best toys to be happy! So price point is something most of us look at when buying anything from car's laptops to RF amplifier's !

All of the weak points int his amps design are easy to fix and not expensive fix's especially if you wait until something fails. Since no OEM parts are available the higher quality after market parts are not only the way to go but they are the best way to go short of designing your own parts cost be darned!!!

One of the cool things about older amps is the fix's are well known and other's have already paved the road ahead for you!

The worst thing for any device is to allow idiots to abuse it. Not many devices allow one to abuse them like you can a HF amp. Their is no way for the manufacture to limit the stupidity level of the purchaser or their inability to follow the owners manual! The amp is depending on the owner to feed it the proper amount of drive. It has no way to say "Hey stupid turn down the darn power now!!!"! Nothing get's abused more then radio's and amplifer's in both 2 way communication and in home audio......

If I was an OEM I would want to sell a radio and amp together that where CPU controlled and tightly regulated so that any deviation from program would either shut the radio down or the amp or both! The two would have a patch cord and talk to each other no cord and no constant stead state of data with random authentication calls and shut it down!That would be the only way I would want to warranty it build it so hard to modify that 98% of the owner's never would! In exchange it would have a fantastic warranty.....If I was selling amps to CB types I would test each unit prior to shipping and print out a report of the actually testing on that unit and would include a video disc of that unit working and being tested. The warranty would be parts only and event hen very very limited like 30 days! I just know how stupid some people on CB can be with regard to their gear!

I had a boss that took a l high voltage compact highly durable light bulb and inserted it into the input circuit of a Texas Star amplifier to keep the knuckle head that owned it from over driving the unit and killing the transistors and other parts. We also put tamper paint on the unit and marked all pot setting with infrared ink that could not be seen with normal light! We had some warranty issues with the unit. We informed the owner of the ant-tamper lengths we had gone to and that if any of them where damaged or altered that we would not warranty the work. We did not tell him about the light bulb. That unit went from failing multiple times to never failing again.

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